Closing this bug with Won't fix as Lucid is no longer supported.
Please feel free to open a new bug report if you're still experiencing this on
a newer release (Bionic 18.04.3 / Disco 19.04)
Thanks!
** Changed in: linux (Ubuntu)
Status: Incomplete => Won't Fix
** Changed in: qemu-kvm (Ubu
Brain Fallik, this bug was reported a while ago and there hasn't been
any activity in it recently. We were wondering if this is still an
issue? If so, could you please test for this with the latest server
release of Ubuntu? ISO images are available from
http://releases.ubuntu.com/raring/ .
If it r
** Changed in: bridge-utils (Ubuntu)
Status: Confirmed => Invalid
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Title:
Broken networking in kvm guests with pcnet driver
To manage noti
** Summary changed:
- Broken networking in kvm guests
+ Broken networking in kvm guests with pcnet driver
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Title:
Broken networking in kvm guests
@Daniel: yes, you can use tap devices with kvm, and attach the tap
devices to the bridge.
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Title:
Broken networking in kvm guests
To manage notif
Following the advice on
http://serverfault.com/questions/341178/downloads-stuck-from-a-vm-run-by-libvirt-kvm-on-ubuntu-10-04-lts
I changed:
To
And now I'm able to transfer my 37GB tar, so it seems a bug in the
virtual drivers.
BTW It's not only downloads that stuck, killing the proccess does n
I have the same problem on 11.10 (old version had it too), if I scp/nfs
a large file it starts, go fast but at some point the network of the
machine does not work anymore. sometimes it transfers 1GB others a
100MB. I use the bridge interface to get to the machine and it still
responding, it seems l
Interesting. If multiple downloads of small files is the problem, could
you retry the experiment from comment #46 but using the small wgets?
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Title
1.
$ virsh dumpxml vs-maven
vs-maven
40f97e28-afc2-1730-3dfb-292074bae1d6
2097152
2097152
1
hvm
destroy
restart
restart
/usr/bin/kvm
> Do you want me to test another mechanism ?
Thanks, but no thanks. While it's not 100% conclusive, this certainly
suggests that the bug may be in the driver in qemu.
To help try to reproduce, can you give:
1. output of 'virsh dumpxml '
2. the release of both your host and guest.
3. an
To reproduce the use case, I need that nc "serves" big files from the
server and that it would be my client which would download the 1MB
file... but I don't manage to use nc correctly to do that.
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Here is what I done in my client :
user@host:~$ cat /dev/urandom | hexdump | head -c 1048576 > /tmp/1MB.txt
user@host:~$ N=1; while [ 1 ]; do echo $N | nc 192.168.1.214 8080; cat
/tmp/1MB.txt | nc 192.168.1.214 8080; ((N += 1)); sleep 0.5s; done
No problem here, in terminal 1 all was displayed w
Could you try wget of large files instead of the echo?
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Title:
Broken networking in kvm guests
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http
I've tested
# terminal 1
root@vs-master:~# brctl delif virbr1 veth0
root@vs-master:~# brctl addif br0 veth0
root@vs-master:~# ip link set veth1 netns 5039
root@vs-master:~# nc -4 -k -l 8080
# terminal 2
root@vs-master:~# /bin/ns_exec -cmn /bin/bash
about to clone with 4002
clone: Invalid argu
It's just another bridge, so you should be able to substitude br0 for
virbr1. Note that if veth0 and veth1 already exist from your last test,
you can either re-use them, or else when you do another 'ip link add
type veth' you'll create veth2 and veth3 and can use those.
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Well I've tried this (after first steps with git)
# terminal 1
root@vs-master:~# ip link add type veth
# terminal 2
root@vs-master:~# /bin/ns_exec -cmn /bin/bash
about to clone with 4002
clone: Invalid argument
root@vs-master:~# echo $$
7934
# terminal 1
root@vs-master:~# ifconfig veth0 0.0
Is there any ywireshark data showing arp and dns traffic at the same
time as the conversation you posted? (it's not in the file itself)
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Title:
B
If all goes well the instructions in comment #35 will cause no problems
and the VM will remain reachable. However a typo could indeed endanger
the network and be less than trivial to fix.
The experiment would only help us to determine whether the bug comes
down to the kernel or part of the virtu
OK, here it is. I'm running 6 VM currently.
admin@vs-master:~$ sudo ifconfig -a
br0 Link encap:Ethernet HWaddr 00:22:19:35:22:71
inet adr:192.168.1.200 Bcast:192.168.1.255 Masque:255.255.255.0
adr inet6: fe80::222:19ff:fe35:2271/64 Scope:Lien
UP BROADCAST R
Unfortunately i don't see anything telling in the wireshark log.
Could you try out the instructions in comment #33 (taking into account
the corrections in comment #35)?
When a VM is running, what do
ifconfig -a
netstat -nr
show?
** Changed in: qemu-kvm (Ubuntu)
Assignee: Serge Hally
marking 'confirmed' in bridge-utils just to get this off "new bug"
lists.
** Changed in: bridge-utils (Ubuntu)
Status: New => Confirmed
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Ti
Yes, here is the Wireshark capture.
Actually, the eth3 is leading to a NetAsq U70-A firewall (8.0.3
firmware) on a DMZ subnetwork. The client I'm using is located on
another subnetwork attached to that firewall.
I can make some test if you want and send me directives...
Moreover, the server has
** Changed in: linux (Ubuntu)
Status: New => Confirmed
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Title:
Broken networking in kvm guests
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Thanks for the info, Anthony. The wireshark info failed to download for
me. Could you attach it here?
My only guess ATM is that it is a bad interaction with the physical
switch or router to which eth3 is attached. I'd ask you to try with
different hardware, but I see you're running production V
It seems it also afects me... I've posted a question on serverfault with
all the details : http://serverfault.com/questions/341178/downloads-
stucked-from-a-vm-run-by-libvirt-kvm-on-ubuntu-10-04-lts (libvirt
0.7.5-5ubuntu27.19 / kvm 1:84+dfsg-0ubuntu16+0.12.3+noroms+0ubuntu9.16
on Ubuntu 10.04.3 LT
Note I made two mistakes in comment 33:
1. only do the 'ip link add type veth' once, not twice,
and
2. the nc sender should send to port , not 999, to match the receiver
port, of course.
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Serge,
On Fri, Sep 10, 2010 at 12:56 PM, Serge Hallyn
<616...@bugs.launchpad.net> wrote:
> Quoting Brian Fallik (616...@bugs.launchpad.net):
>> 6. apt-add-repository ppa:kernel-ppa/pre-proposed
>
> Did you do an apt-get update here? If not, then you didn't get the
> updated kernels.
Yes, I just
Quoting Brian Fallik (616...@bugs.launchpad.net):
> 6. apt-add-repository ppa:kernel-ppa/pre-proposed
Did you do an apt-get update here? If not, then you didn't get the
updated kernels.
> 7. apt-get install linux-headers-server linux-image-server linux-server
> 8. rebooted the machine
> 9. repro
Serge,
I've completed (I hope) your suggestions. Unfortunately neither the new
KVM nor the new kernel seemed to resolve the issue. More details below
but I'm not sure where to take this from here. As you point out, it
might be an issue with our environment. I doubt it's bad software
installed
Serge,
Apologies for the delay. This bug occurs on a production system for us
so it's challenging to find time to run experiments. Now is a good time
so I should have some new results for you shortly.
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Addendum to the above - it's been pointed out to me that scp DOES trigger the
bug for you, so I was completely unable to reproduce your bug.
My setup however was using the 0.12.5 kvm listed above, as well as the
lucid pre-proposed kernels from
https://launchpad.net/~kernel-ppa/+archive/pre-propos
(tried to reproduce with an i386 guest on x86-64 host with NAT config, no
luck - but again i was reduced to testing with scp, firewalled away from any
public svn trees)
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(Note to self - it may be worth-retrying with an i386 guest on previous
setup)
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Alas, the unfirewalled machine I was going to try on has now been
taken away. I may be able to reproduce this using user-space qemu
on a VM on a cluster, and will try that next week if I have to, but
in the meantime:
I'm planning to try to upload qemu-kvm 0.12.5 to the lucid-backports
ppa in the
On Mon, Aug 30, 2010 at 2:04 PM, Serge Hallyn <616...@bugs.launchpad.net> wrote:
>> Side question: every time I switch networking times, the guest bumps
>> ethernet device number (eth0, eth1, ...). This makes it annoying to
>> reset networking to switch static/dhcp on the next reboot. Is there a
>>
> I switched networking back to NAT and repeated the svn co to verify the
> problem still exists. It does. Then I tried the wget operation 5 times
> and all of them succeeded.
Ok, then I'll have to re-test on a machine where I'm not firewalled.
Will post the results as soon as I have a chance to s
Serge,
I switched networking back to NAT and repeated the svn co to verify the
problem still exists. It does. Then I tried the wget operation 5 times
and all of them succeeded.
I also verified that we're using the same default.xml configuration. They're
almost identical except for one interes
I set up a NAT config using the following
/etc/libvirt/qemu/networks/default.xml:
default
but with repeated wgets of ~1M was not able to get any hang.
I'm really not sure where to go with this one, other than to look over your
wireshark output a little more for n
Brian, do you get the bug also when you just wget a large file (say
wget
http://archive.ubuntu.com/ubuntu/pool/restricted/b/bcmwl/bcmwl_5.60.48.36+bdcom.orig.tar.gz
)?
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Thanks, Brian - no, next it's up to me to try to reproduce with the
NAT config. I need to rebuilt my test system first though. Hoping
to have results in the afternoon.
** Changed in: qemu-kvm (Ubuntu)
Assignee: (unassigned) => Serge Hallyn (serge-hallyn)
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Broken networking in kvm guests
Serge,
Some interesting updates.
First, with both guests running (bridged mode with br0) I ran 'brctl stp
br0 on'. Everything still worked fine.
Next I moved one of the guests from bridged mode back to virtual net (using
virbr0). I was immediately able to reproduce the connection reset proble
can you try 'brctl stp br0 on' and see if all still works?
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Serge,
$ brctl show
bridge name bridge id STP enabled interfaces
br0 8000.001a64b33b10 no eth0
vnet0
vnet1
virbr0 8000.0
Quoting Brian Fallik (616...@bugs.launchpad.net):
> Serge,
>
> I've gotten the bridge configuration set up and everything seems stable
> and working after a few hours of testing. Obviously we'll keep watching
> it over the next few days. Thanks for the suggestion for the
> workaround. It'd be n
Serge,
I've gotten the bridge configuration set up and everything seems stable
and working after a few hours of testing. Obviously we'll keep watching
it over the next few days. Thanks for the suggestion for the
workaround. It'd be nice to understand the issue with the original
configuration bu
On Thu, Aug 26, 2010 at 9:01 AM, Serge Hallyn <616...@bugs.launchpad.net> wrote:
> 2. you said
>
>> In the scenario you suggested which seemed to work, tap1 was bridged
>> directly to eth0 and used an IP address from the host's actual subnet. This
>> is similar to:
>> http://wiki.libvirt.org/page
Hi Brian,
I think the two easiest things to test next are:
1. in my setup, stp was disabled on br0, in yours I think it was
enabled. You might try your setup with stp disabled (which really
should not be what you want, but it's a test).
2. you said
> In the scenario you suggested which seemed
Serge,
I think I'm starting to understand this issue and I'm fairly certain the
problem is in libvirt.
First off, it seems like I can repeatedly checkout depot_tools in a KVM
using a setup that I think matches your example except for a new (and
different) error.
My first step was shutdown libvir
Tried to reproduce with a hardy guest, but that failed as well.
Did this use to work before a particular upgrade, or is this the first
you've tried?
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Quoting Brian Fallik (616...@bugs.launchpad.net):
> Serge - my uploads in comment #5 and comment #6 should have been while
> guest #1 (Lucid) was running. This problem occurs regardless of 1 or 2
> guests are running. I've stopped launching the second guest (Hardy)
> since the number of guests se
Serge - my uploads in comment #5 and comment #6 should have been while
guest #1 (Lucid) was running. This problem occurs regardless of 1 or 2
guests are running. I've stopped launching the second guest (Hardy)
since the number of guests seemed irrelevant.
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http
Brian - could you upload the brctl show and ifconfig -a output while the
two guests are running?
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Serge,
Thanks for taking a look here. I've found that the svn operation can
succeed once before failing. I don't think it's ever succeeded for me
twice in a row.
I'm going to try and mimic your steps to see if I can reproduce the
problem again. I had been using libvirt to manage virtualization
I failed to reproduce this. Here is how I tried. I have a
10.04.1 lucid host. My /etc/network/interfaces looks like:
# This file describes the network interfaces available on your system
# and how to activate them. For more information, see interfaces(5).
# The loopback network interface
auto
** Changed in: qemu-kvm (Ubuntu)
Status: Incomplete => Confirmed
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** Attachment added: "ifconfig -a"
https://bugs.launchpad.net/ubuntu/+source/qemu-kvm/+bug/616064/+attachment/1516203/+files/ifconfig_a.log
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** Attachment added: "brctl show"
https://bugs.launchpad.net/ubuntu/+source/qemu-kvm/+bug/616064/+attachment/1516198/+files/brctl_show.log
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Brian,
Can you please include the info from:
brctl show
ifconfig -a
Both those commands should be executed on the host.
Thanks!
** Changed in: qemu-kvm (Ubuntu)
Status: Confirmed => Incomplete
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** Changed in: qemu-kvm (Ubuntu)
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Here's example failure output from running the command inside the Lucid guest:
$ svn co http://src.chromium.org/svn/trunk/tools/depot_tools
svn: PROPFIND of '/svn/trunk/tools/depot_tools': Could not read status line:
Connection reset by peer (http://src.chromium.org)
The same command is always
Re: "I can see these RST packets via Wireshark but can't explain their
source". Where do those RST packets appear to come from ?
** Changed in: qemu-kvm (Ubuntu)
Importance: Undecided => Medium
** Changed in: qemu-kvm (Ubuntu)
Status: New => Incomplete
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** Attachment added: "BootDmesg.txt"
http://launchpadlibrarian.net/53444870/BootDmesg.txt
** Attachment added: "CurrentDmesg.txt"
http://launchpadlibrarian.net/53444871/CurrentDmesg.txt
** Attachment added: "Dependencies.txt"
http://launchpadlibrarian.net/53444872/Dependencies.txt
** A
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